mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 546

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 13 Periodic Interrupt Timer (S12PIT24B4CV1)
13.3.0.2
Read: Anytime
Write: Anytime; writes to the reserved bits have no effect
13.3.0.3
Read: Anytime
Write: Anytime; writes to the reserved bits have no effect
546
PFLT[3:0]
PCE[3:0]
Reset
Reset
Field
Field
3:0
3:0
W
W
R
R
PIT Force Load Bits for Timer 3-0 — These bits have only an effect if the corresponding timer channel (PCE
set) is enabled and if the PIT module is enabled (PITE set). Writing a one into a PFLT bit loads the corresponding
16-bit timer load register into the 16-bit timer down-counter. Writing a zero has no effect. Reading these bits will
always return zero.
PIT Enable Bits for Timer Channel 3:0 — These bits enable the PIT channels 3-0. If PCE is cleared, the PIT
channel is disabled and the corresponding flag bit in the PITTF register is cleared. When PCE is set, and if the
PIT module is enabled (PITE = 1) the 16-bit timer counter is loaded with the start count value and starts
down-counting.
0 The corresponding PIT channel is disabled.
1 The corresponding PIT channel is enabled.
PIT Force Load Timer Register (PITFLT)
PIT Channel Enable Register (PITCE)
0
0
0
0
7
7
= Unimplemented or Reserved
= Unimplemented or Reserved
0
0
0
0
6
6
Figure 13-4. PIT Force Load Timer Register (PITFLT)
Figure 13-5. PIT Channel Enable Register (PITCE)
Table 13-2. PITFLT Field Descriptions
Table 13-3. PITCE Field Descriptions
MC9S12XDP512 Data Sheet, Rev. 2.17
0
0
0
0
5
5
0
0
0
0
4
4
Description
Description
PFLT3
PCE3
0
0
0
3
3
PFLT2
PCE2
0
0
0
2
2
Freescale Semiconductor
PFLT1
PCE1
0
0
0
1
1
PFLT0
PCE0
0
0
0
0
0